Mechanical movement.



W. G. STROZIER. MECHANICAL MOVEMENT. APPLICATION FILED NOV.27. 39H.

1 ,286,829, Patented Dec. 3, 1918.

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UNIED STATES PATEN QFIQ.

WEBSTER G. STROZIER, OF WASHINGTON, DISTRICT OF COLUMBIA.

MECHANICAL MOVEMENT.

To all whom it may concern:

Be it known that I, WEBSTER .G. STRo'zmR, a citizen of the United States, residing at a Washington, in the District of Columbia,

have invented new and useful Mechanical Movements, specification. j

' This invention relates to mechanical movements particularly adapted for use in connectionwithwood working machines and is designed more especially as an improvement upon thestructure disclosed in Patent No. 1197 964,- issued tome on September 12, 1916.

One of the objects of the invention is to provide improved means; whereby the cut ting tools and the feed table can be shifted to produce the desired, cut in the stock, the shifting mechanism being simple, durable and compact and constructed of the minimum number of parts.

With the foregoing and other objects in view which 'will. appear as .the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood thatchanges in the precise embodiment of the invention herein disclosed, can be made within the scopeofwhat is claimed, without departing fromthescope of the invention.

In the accompanying drawings thepreferred form of the invention has been, shown.

In said drawings 1 Figure lisja side elevation of the shifting mechanism constituting the present invention, parts being broken away.

- Fig. 2 1s a plan view of the structure shown in Fig. 1.

Fig. 3 is asection on line 3-4-3 of Fig. 1.

Fig. 4: is a section on line 44 of Fig. 1.

Referring tothe figures by characters of reference 1 designates a shaft having a gear 2; which meshes with a rack bar 3 movable with the feed. table of the machine so that when the gearisrot-ated the rack bar 3 and the feed table to which-itfis connected will be moved forwardly or backwardly. Fitted on shaft 1 istheflhub 4 "of a' wheel 5, the

' periphery of this wheel being broadened for a portion of the length thereofas'shown at 6, there being a transverse groove 7 within this broad portion and which extends from one side to the'other thereof, a dove-tailed guide rib 8 being arranged on the bottom of .the groove 7 and extending longitudinally Specification of Letters Patent. i

of which the following is a wheel 5, this groove extending into the broad portion 6 and being intersected by the Patented Dec. 3, 1918. Application filedNovember 27, 1917. Serial No. 204,230.

groove 7. Short grooves 11 and 12 are formeduat opposite sides of the groove 10 and within the broad portion 6 at one side of the transverse groove 7. r

A switch block. 13 is slidably mounted within the groove 7 and has a dove-tailed groove 14 in the bottom thereof for receiving the dove-tailed rib 8 as shown particularly in Fig. 1. In the outer or exposed face of this switchblock are formed two end blocks 15 and 16 extending along diverging curved lines. The cam grooves are so positioned and proportioned that when the switch block 13 is at one end of its movement the groove 15 will establish communication between one end of the groove 10 and the short groove 11, and, when the switch block 13 is at its other extreme position, the groove 16 will establish communication between said end of the groove 10 and the short groove 12.

A. pin 17 works within the groove 10 and extends from one end of a bar 18 which is extended'laterally of the machine and is adapted to be connected to and to shift revoluble cutting elements not shown but which can be the same asthose disclosed in 7 my patent heretofore mentioned.

The outer side of the wheel 5 is formed with a circular recess 19 in which a disk 20 ismounted for rotation, this disk being mounted loosely on the shaft 1 and being provided, in its periphery, with a continuous,

zigzag groove 21. Into this groove projects a pin 22 which extends from the switch block 13 and through the slot 9 (see Fig. 3).

A circular recess 23 is formed in the outer face-of thedisk 20 and pivotally mounted in this recess close to the wall thereof is a spring pressed pawl 2a. This pawl is designed normally to engage a ratchet wheel 25 adapted to rotate freely within the recess- 23 and which ratchet wheel has an annular flange 26 which bears against the outer side of the disk 20 so as to close the recess 23. Ratchet wheel 25 is mounted on the reduced end 27 of the shaft 1 and is held in. place.

7 ed to be engaged successively by a spring within a casing 32 forming shown in Figs. 1 and pressed restrainingipin 31 slidably mounted part of a bracket 33 which is secured to the side ofthe'wheel 5. This pin serves vto hold the disk 20 against free rotation within the wheel 5 although it will be thrust laterally out of the recessin which it is seated when the disk 20 is sub jected to excessive pressure. I V

The ratchet wheel 25 has a lever 34 attached to it and extending radially therefrom, this lever working between a stop shoulder 35 formed by one end'of the widened portion 6 of the rim of wheel 5 and a stop lug 36 extending laterally from the wheel.-

Assuming that the parts are in positions 2 it will be apparent that'when the lever 34 is pressed downwardly it will push, through pin 36, upon the wheel 5 and, through the ratchet wheel 25 and the pawl 24, against the disk 20 so that said wheel 5 and disk 20 will rotate-together in one direction and will cause-the cam groove 15 to receive; the pin 17 and cause said pin ultimately to receive therein the groove 11. During this movement the gear 2 will be moving the feed rack 3 of the table connected thereto and the bar 18 will be shifted laterally by the walls of the cam groove 15 working against the pin 17. As soon as this movement has stopped as a result of the pin 17 arriving at the end of the groove 11, lever 34 can be swung-upwardly. This will cause the ratchet wheel to slip past the pawl 24 until lever 34 comes against the shoulder 35 whereupon the continued upward movement of said lever will result in the wheel;5 being turned in a clockwise'direc tion,,-thereby permitting the pin 17 to return to its position in the groove 10 as shown in Fig. 2. By then moving the lever 34 downwardly said lever will shift away 7 from the shoulder 35 and toward the pin 36 and during this 'movement the engaged ratchet will push against the pawl 24 and cause the disk 20 to rotate within the'wheel 5 in spite of the restraining influence-of the spring pressed pin 31. The movement of the disk relative to the wheel during the shifting of lever 34 from shoulder 35 to pin 36 will be sufiicient to cause the zigzag groove 21 to shift pin 22 to its other extreme position inslot 9 with the result that the switch block 13 will be shifted to bring the groove 16, into communication with the grooves 10 and 12. This shifting is efi'ecte'd just as the lever 34 engages the pin 36 and during the continued downward movement of said lever 34, the wheel 5 willbe rotated therewith as before in a counter clockwise direction, thus 7 causing the pin 17-to enter groove 16 and groove 12, resulting in the bar 18 being shifted in the opposite direction fromthat heretofore described, during the feedingof an annular groove,

thie rack bar 3 and its feed table toward the le t. i V

The foregoing operation can be repeated indefinitely and the bar 18'will beshifted movable alternatelyinto register with onefx end of the annular groove, a ,member adapted to travel, within andto be shifted by the walls of said grooves, an actuating lever, and separate means operated'by said lever for successively shifting the switch block from one extreme position to the other and for rotating the wheel;

2. Shifting mechanism for woodworking machines including a whe'e'lhaving an annular groove, intersected by v a transverse groove, a switch block slidablycmounted in the transverse groove and having diverging cam grooves adapted successively to register with on'e'end of the annular groove, a member adapted to travel within and to'be shifted laterally by the walls of the annular and cam grooves, means revoluble :within the wheel for shifting the switch block in opposite directions successively, an a'ctuatinglever, and separate meansoperated therebyifor successively shifting the switch block in either direction and rotating the wheel.

3'. Shifting mechanism for wood working 7 machines including a wheel an annular groove, intersected by a transverse groove, a switch block slidably mounted in the transverse groove and having diverging cam and yieldable restraining'means for retarding the'independent movement of the wheel and the shifting means therein.

4. Shifting mechanism for wood working machines including a wheel having an annular groove intersected by a transverse groove, a switch block slidably mounted in the transverse groove andhavlng' diverging cam grooves adapted successively to register Wlth one end of the annular groove, a disk mounted for rotation within. the wheel and having a zig zag groove in its periphery,

means extending from the switch block and pro ect1ng into saidzig zag groove, a lever,

separate means operated by the lever for In testimony that, I claim the foregoing successively rotating the disk 'Within the as my own I have hereto aflixed my signaw Wfheel to shift the ds fvit'eh block in eililzhar ture in the presence of tWO'WItHG/SSGS.

0 two directions an or rotatin t e W ee V I 5' and means movable Within the peripheral WEBSTER STROZIER' and cam grooves in the Wheel and switch Witnesses:

block for actuation by the Walls of said IVY E. SIMPSON,

grooves. AGNES RooKELLI.

Copies of this patent may be obtained for five cents each, by eddressing the Commissioner of Patents.

'- Washington, D. 0. r 

